path.cpp

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#include "odva_ethernetip/path.h"

#include <boost/asio.hpp>

namespace eip {

Path::Path(bool pad_after_length) : pad_after_length_(pad_after_length)
{
  path_buf_.reserve(6);
}

Path::Path(EIP_USINT class_id, EIP_USINT instance_id, EIP_USINT attribute_id,
  bool pad_after_length) : pad_after_length_(pad_after_length)
{
  path_buf_.reserve(6);
  addLogicalClass(class_id);
  addLogicalInstance(instance_id);
  addLogicalAttribute(attribute_id);
}

Path::Path(EIP_USINT class_id, EIP_USINT instance_id) : pad_after_length_(false)
{
  path_buf_.reserve(4);
  addLogicalClass(class_id);
  addLogicalInstance(instance_id);
}

void Path::addSegment(EIP_USINT type, EIP_USINT data)
{
  path_buf_.push_back(type);
  path_buf_.push_back(data);
}

void Path::addLogicalClass(EIP_USINT class_id)
{
  addSegment(0x20, class_id);
}

void Path::addLogicalInstance(EIP_USINT instance_id)
{
  addSegment(0x24, instance_id);
}

void Path::addLogicalAttribute(EIP_USINT attribute_id)
{
  addSegment(0x30, attribute_id);
}

void Path::addLogicalConnectionPoint(EIP_USINT connection_id)
{
  addSegment(0x2C, connection_id);
}

size_t Path::getLength() const
{
  return sizeof(EIP_USINT) + path_buf_.size() * sizeof(EIP_USINT) + (pad_after_length_ ? 1 : 0);
}

Writer& Path::serialize(Writer& writer, bool pad_after_length) const
{
  EIP_USINT length = path_buf_.size() / 2;
  writer.write(length);
  if (pad_after_length)
  {
    EIP_BYTE reserved = 0;
    writer.write(reserved);
  }
  writer.writeBuffer(boost::asio::buffer(path_buf_));
  return writer;
}

} // namespace eip